Agreed. And the haters forget that most people recognise their countries relative role.
For instance as an Australian Im completely fine with Australia as a sub-faction within UK+Commonwealth. That makes the most sense since we used basically all British weapons except our own Owen and Austen, CAC Boomerang, Wirraway etc.
Likewise our friends from Brazil or Puerto Rico, they are fine as event/premium squads for US (or just add the uniforms as a customisation option which is very easy to do).
Whereas nations like France and China I believe deserve their own factions due to the amount of unique weapons and the locations they fought.
China can be difficult since a lot of their tech was ‘copy paste’ so to speak but that also means in my opinion its a challenge to decide whether they should be placed under the USA or USSR as they used both tech (plus German and some British stuff).
But certainly France, together with Poland and the Netherlands imo should be in game and I believe Chinese squads should be at least somewhere in a tech tree.
There are the nationals of those countries who want to fight as their countrymen, but also people like myself, I have no specific connection to France I just think their uniforms are cool, weapons are unique and I desperately want a change from the same old same old USA storming the beaches on D Day.
Its about variety and interest. We remember how cool it was when we got a whole new campaign, as you say, anyone regardless of their nationality will be intrigued and keen to try new factions, especially ones like France, Poland and China which arent featured in games normally.